Trench digging shovel



FIG. 1 is a perspective view of a trench digging shovel showing our new design, the broken lines shown are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top plan view of the trench digging shovel;

FIG. 3 is a left side elevational view of the trench digging shovel;

FIG. 4 is a bottom plan view of the trench digging shovel;

FIG. 5 is a front elevational view of the trench digging shovel; and,

FIG. 6 is a rear elevational view of the trench digging shovel. 

The ornamental design for the trench digging shovel, as shown and described. 